My daughter has this, her only symptom was mucus in her poop, My first baby also has this and he had eczema and was very very unsettled!
Reflux, screaming in pain, diarrhoea followed by constipation (eventually turned into bloody and mucusy poop) rash on face and back 🥲🥲
Reflux/projectile vomiting, pain after feeds (screaming and squirming), mucusy runny💩 followed by constipation for a few days, blotchy skin which turned into eczema on face and eventually on chest x